Tensile strength distribution of carbon fibers at short gauge lengths
Tensile strength distribution of carbon fibers at short gauge lengths
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DOI：
10.1080/09243046.2014.915120
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发表时间：
2014-09-03
影响因子：
2.9
通讯作者：
Okabe, T.
中科院分区：
文献类型：
--
作者：
Watanabe, J.;Tanaka, F.;Okabe, T.
在这项研究中，我们确定了不同的短标距长度（~1 mm）的高强度聚丙烯腈基碳纤维的强度分布使用单纤维复合四点弯曲试验和单纤维拉伸试验。我们采用双峰威布尔模型来解释实验数据。我们发现，短标距长度的威布尔形状参数的值高于长标距长度。这意味着碳纤维的抗拉强度分布由两种不同的缺陷群控制。双峰Weibull分布预测的树脂浸渍纤维束的拉伸强度与实验结果更好地吻合比单峰Weibull分布的基础上预测的拉伸强度。
In this study, we determined the strength distribution of high-strength polyacrylonitrile-based carbon fibers of different short gauge lengths (~1 mm) using both the single-fiber-composite four-point bending test and the single-fiber tensile test. We employed the bimodal Weibull model to explain the experimental data. We found that the value of the Weibull shape parameter for short gauge lengths was higher than that for long gauge lengths. This implies that the tensile strength distribution of carbon fibers is governed by two different flaw populations. The tensile strength of resin-impregnated fiber bundles predicted on the basis of the bimodal Weibull distribution was in better agreement with the experimental result than the tensile strength of those predicted on the basis of the unimodal Weibull distribution.